Named in honor of Tan Jiazhen (1909– ), professor at Fudan University and considered the founder of genetics in China. His creative work leading to the discovery of the mosaic-dominance phenomenon in the color-pattern inheritances of the ladybug and of the role of chromosomal rearrangements and gene changes in Drosophila speciation were recognized as outstanding contributions to the development of classical gene theory and the modern synthetic theory of evolution. (M 34619) _ _.